Question

是否有任何语法可以执行以下操作

var obj = {a: this, b: this}

并获取

obj = {a: 'a', b: 'b'}

Answer 1

你可以这样做：

var obj = {a: "this is A", b: "this is B"}
obj.a equals to "this is A"
obj.b equals to "this is B"

使用此对象示例添加存储在对象中的指针位置的快速代码段：

＆＃13;

function getMousePosition(event){

var mouse = {x: 0, y: 0};
mouse.x = event.clientX;
mouse.y = event.clientY;

Elem = document.getElementById("Elem");

Elem.innerHTML = "Simple Mouse Position by Khriztian Azuaje.<br><br>" + "X pos: " + mouse.x + ", Y pos: " + mouse.y;
}

＆＃13;

#Elem {
  background:black;
  text-align: center;
  color:white;
  padding:2px;  
  display: flex;
  align-items: center;
  justify-content: center;
  height:160px;
}

＆＃13;

<body onmousemove="getMousePosition(event)">
<div id="Elem"></div>
</body>

＆＃13;

Answer 2

如果你想创建一个具有一堆键和值等于相同字符串的对象，它就像这样简单：

var obj = {};
['a','b'].forEach(function(item) {
    obj[item] = item;
});

Answer 3

是的！我不确定你为什么要使用但是在这里：

var obj = { a: 'you', b: 'they'};
var newObj = {};

for (var key in obj) { 
    newObj[key] = key
};

//newObj = {a: "a", b: "b"}

在javascript中创建对象时，请参阅键入值

3 个答案: